Chrysler is putting WiFi on wheels with plans for a new vehicle-based wireless Internet system. The automaker’s upcoming Uconnect Web service — announced Thursday in Detroit — will let travelers turn their cars into moving WiFi hotspots. The service, powered by AutoNet Mobile, will cost $29 per month and will require a dealer-installed $449 mobile router. Uconnect Web will launch in a limited capacity in August, with service becoming available for all Chrysler, Jeep and Dodge vehicles by September.